The Nissan Terra Concept is an off-road, zero-emissions that was dropping jaws in Paris and is ready to push a (personal) favorite like the Juke into new territory. The Terra is set to run fully on fuel-cells, and if it hits market by 2014, will redefine how we think about "treading lightly" through rough terrain.

The second car that was causing major whiplash was the Mercedes-Benz SLS AMG Electric Drive. It's a supercar with zero emissions and is even more powerful than the gas model for goodness sake. Also, it puts to rest ideas that we can't house new, environmentally friendly technology in traditionally elegant bodies. The car will hit 60 in 3.9 and have 740 horses galloping. That's impressive. These two concepts make us believe that electric and real driving can mix.